diff --git a/README.md b/README.md
index 00dfac2c6..a9660ffd4 100644
--- a/README.md
+++ b/README.md
@@ -89,6 +89,10 @@ How does it work?
 [`use-type-alias`]: ./sonarts-core/docs/rules/use-type-alias.md
 [`requires type-check`]: https://palantir.github.io/tslint/usage/type-checking/
 
+## Prerequisites
+
+Node.js (>=6.x).
+
 ## Use in TSLint
 
 * If you don't have TSLint yet configured for your project follow [these instructions](https://github.com/palantir/tslint#installation--usage).
diff --git a/sonarts-core/package.json b/sonarts-core/package.json
index f04d9437e..bcc66ae68 100644
--- a/sonarts-core/package.json
+++ b/sonarts-core/package.json
@@ -33,6 +33,9 @@
     "url": "https://github.com/SonarSource/SonarTS/issues"
   },
   "homepage": "https://github.com/SonarSource/SonarTS",
+  "engines": {
+    "node": ">=6"
+  },
   "dependencies": {
     "immutable": "^3.8.2"
   },